The add_face method of the Entities class both draws the surface in the design window and returns a face object.

entities类的add_face方法在设计窗口中画出该平面，并返回一个face对象。

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This paper introduces a simply and flexible design method that the font of caption in the window title can be changed.

一种字体可变的窗口标题的设计方法，这种方法简单，灵活，可以实现各种不同字体不同颜色的窗口标题。

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By using MATLAB signal and using window method, frequency sampling and Chebyshev approximation the design of low pass digital filter in the toolbox have been processed.

采用窗函数法、频率抽样法和切比雪夫最佳一致逼近法，通过调用Matlab信号处理工具箱中的函数设计低通数字滤波器。

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